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Mercaptooxazole–phenazine based blue fluorescent sensor for the ultra-sensitive detection of mercury(ii) ions in aqueous solution
- Zhang, Hai-Li, Li, Wen-Ting, Qu, Wen-Juan, Wei, Tai-Bao, Lin, Qi, Zhang, You-Ming, Yao, Hong
- RSC advances 2017 v.7 no.75 pp. 47547-47551
- aqueous solutions, color, detection limit, fluorescence, ions, mercury, moieties, pH
- Herein, a mercury(ii) ion fluorescent sensor (Z-3) with high sensitivity and immediate response is designed and synthesized. The sensor uses the phenazine group as a luminophore and sulfhydryl as a recognition moiety. The sensor is easily synthesized and it exhibits a remarkable blue shift with Hg²⁺. Correspondingly, its fluorescence color changes from yellow to blue. In addition, the low naked eye detection limit (10⁻⁵) of the sensor allows the identification of concentration limits. Moreover, the sensor could detect mercury(ii) ions over a wide pH range (from 2 to 8), which indicates that the detection can be carried out in aqueous systems. In addition, test strips are fabricated, which could act as a convenient pathway for the recognition of Hg²⁺.